50 lines
997 B
JavaScript
50 lines
997 B
JavaScript
const friend1 = "Michael";
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const friend2 = "Steven";
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const friend3 = "Peter";
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const friends = ["Michael", "Steven", "Peter"];
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console.log(friends);
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const years = new Array(1991, 1986, 1990);
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console.log(years);
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console.log(friends[0]);
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console.log(friends[1]);
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console.log(friends[2]);
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console.log(friends.length);
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console.log(friends[friends.length - 1]);
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friends[2] = "Jennifer";
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console.log(friends);
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const firstName = "David";
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const david = [
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firstName,
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"Aster",
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new Date().getFullYear() - 1986,
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"developer",
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friends,
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];
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console.log(david);
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const calcAge = function (birthYear) {
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return new Date().getFullYear() - birthYear;
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};
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const yearsOfFriends = [1990, 1986, 1991, 2000, 1970];
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const age1 = calcAge(yearsOfFriends[0]);
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const age2 = calcAge(yearsOfFriends[1]);
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const age3 = calcAge(yearsOfFriends[yearsOfFriends.length - 1]);
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console.log(age1);
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console.log(age2);
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console.log(age3);
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const ages = [age1, age2, age3];
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console.log(yearsOfFriends);
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console.log(ages);
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